Fujitsu Corporation

Yoshiaki Hiratsuka

Kenji Nagase

Tomoyuki Nakao

Yoshihiro Sawada

Keisuke Nakamura

Hisashi Yoshinaga

Masanori Yamaguchi

Masaharu Suzuki

Yoshinori Mesaki

Akio Ikeda

Kai Nojima

Yoshiro Tanaka

Nobukazu Yokomizo

Yosuke Konaka

Takayuki Niiyama

Daisuke Seki

Tsutomu Yoshii

An information processing apparatus includes a memory, and a processor coupled to the memory and configured to receive a designation of a progression degree in which a circuit pattern displayed on a two-dimensional model of a printed circuit board is traced from a start point to an end point of the circuit pattern, display, on the two-dimensional model, the circuit pattern from the start point to a point corresponding to the progression degree on a three-dimensional model of the printed circuit board based on a setting of the start point and the end point of the circuit pattern, and display the circuit pattern of the two-dimensional model to distinguish a first pattern to form a part of the circuit pattern and a second pattern to form a part of the circuit pattern, the first pattern and the second pattern having portions overlapping each other.

Information processing apparatus and circuit pattern display method

A coupling distance y of a plurality of securing elements for coupling two members to construct a casing for accommodating a circuit board having electric components mounted thereon inside space surrounded by a conductor extracted from design data, an overlapping width x of overlap sections provided to the two members for coupling the two members with the plurality of securing elements, the overlap sections contacting to each other, and a wavelength &#x3bb; of electromagnetic noises generated from the electric components, are extracted. Then, a recommended coupling distance Y for the plurality of securing elements to attenuate the electromagnetic noises by a certain attenuation amount is calculated, based on the overlapping width x and the wavelength &#x3bb;, and the coupling distance y is compared with the recommended coupling distance Y. Thereby, verifications of an electromagnetic noise countermeasure can be made reliably without relying on settings by a user.

Non-transitory computer-readable recording medium having electromagnetic noise countermeasure verification program recorded thereon, information processing apparatus, and method of verifying electromagnetic noise countermeasure

A housing includes a first member that has a first conductor, a second member that has a second conductor and cooperates with the first member to accommodate a circuit board on which an electronic element is mounted, inside a space surrounded by the first conductor and the second conductor, and a plurality of connecting elements that are arranged at a predetermined arrangement interval y to fix the second member to the first member.

Housing and electronic device

A via adding method comprising: identifying a target area where a via is to be added in a printed circuit board; determining a starting point for starting a search for a location of the via in the target area; and moving a search point along a path in an intersecting direction that intersects a radial direction around the starting point while moving the search point in the radial direction and determining whether the via is to be added at a moved search point.

Via adding method

A non-transitory recording medium storing a program that causes a computer to execute a circuit board design assistance process. The circuit board design assistance process includes: extracting, from design information of a multilayer circuit board in which a plurality of layers are layered, a plurality of ground patterns in the multilayer circuit board that are within a predetermined distance from a path of a signal that flows in the multilayer circuit board; resolving a region at which the plurality of ground patterns are electronically separated as being a discontinuity region; and displaying the resolved discontinuity region.

Storage medium storing circuit board design assistance program, circuit board design assistance method, and circuit board design assistance device

A design support apparatus includes: an area identifying unit configured to identify a target area where a via is to be added in a printed circuit board; a determining unit configured to determine a starting point for starting a search for a location of the via in the target area; and a searching unit configured to move a search point along a path in an intersecting direction that intersects a radial direction around the starting point while moving the search point in the radial direction and to determine whether the via is to be added at a moved search point.

Support apparatus

A computer-readable recording medium having stored therein a program for causing a computer to execute a process for information processing comprising: performing, for a plurality of noise countermeasure design checks for a plurality of nets provided on a substrate, an initial noise countermeasure design check on each of the plurality of nets in an execution order determined, when one of the checks is passed, on the basis of other noise countermeasure design checks that may be skipped; and performing, if it is determined on the basis of at least a check result of a noise countermeasure design check which has been performed immediately before a corresponding check that there is a next noise countermeasure design check that may not be skipped in the execution order, the next noise countermeasure design check for each of the plurality of nets.

Method, device, and a computer-readable recording medium having stored program for information processing for noise suppression design check

A printed circuit board design assisting device includes a frame ground extraction section that extracts a ground pattern that is provided in a surface layer of a printed circuit board and that is to be connected to a metal component from design data on the printed circuit board stored in a design data storage section to store information for specifying the ground pattern in a data storage section, an electrostatic discharge determination section that performs a determination as to electrostatic discharge for the ground pattern specified from the information stored in the data storage section to store a determination result in a determination result storage section, and an output section that outputs the determination result stored in the determination result storage section.

Printed circuit board design assisting device, method, and program

In a first step, two conductive plates such as two zinc galvanized (electroplated) steel plates with films formed on surfaces thereof, are prepared; a flexible conductive material is held between these two zinc galvanized (electroplated) steel plates. A spacer is also held between the two zinc galvanized (electroplated) steel plates to regulate the space therebetween and a measurement object such as a conductive cloth is held between the flexible conductive material and at least one of the zinc galvanized (electroplated) steel plates. In a second step, the electric resistance between the two zinc galvanized (electroplated) steel plates is measured while the flexible conductive material is held together with the measurement object between the two conductive plates.

Resistance measurement method and component inspection process

An electrical resistance measurement method and a component inspection process to which the electrical resistance measurement method is applied. In the first step, a measuring object, for example, one pair of zinc-plated steel plates on which surfaces films are formed is prepared. Then, an elastic electroconductive material is sandwiched by the pair of zinc-plated steel plates and a spacer which regulates a space between the zinc-plated steel plates. Next, in the second step, an electrical resistance is measured in a state in which the pair zinc-plated steel plates sandwich the elastic electroconductive material.

Electrical resistance measurement method and component inspection process

The present invention provides a connector in which countermeasures against external noise and radiation noise are taken, and an information processing apparatus having such a connector, which suppresses both the external noise and radiation noise. The connector is disposed at an opening formed in an outer face of an information processing apparatus such that the connector does not project from the outer face, a shield cable being connected to the connector from the opening. An end face on the side of the opening is made of an insulative material. The connector includes a signal terminal which connects a signal line of the shield cable and a processing circuit of the information processing apparatus with each other and which is provided at a location other than the end face, and a shield conductor which connects a shield of the shield cable and a ground of the information processing apparatus with each other and which is provided at a location other than the end face.

Connector with isolating end face and side connections and information processing apparatus including connector

A shield structure for information technology equipments includes an opening part provided in a portion of the shield structure and a lid covering the opening part. A signal ground line is provided on a printed circuit board accommodated in the enclosure. An electric connection material extends between the lid and the signal ground line of the printed circuit board and has at least a surface formed by an electrically conductive material. The electric connection material is in contact with the signal ground line of the printed circuit board.

Shield structure for information technology equipments

The invention provides an electronic device that is environment-friendly and capable of achieving satisfactory noise prevention effect at low cost, and a housing implementing such electronic device. The housing has an electronic circuit disposed therein, and includes a component exposure section in which part of a conductive component disposed in the housing is exposed outward, a plate section made of a conductive material having a predetermined thickness, and spreading at a distance from the component exposure section, and a bridge section with the overall thickness thereof larger than the thickness of the plate section, extending along the component exposure section and electrically connecting the plate section and the conductive component.

Electronic device and housing

A printed-circuit board includes a shield pattern layer that is stacked on a surface layer with respect to at least one wiring pattern layer that includes a wide-pattern area having a wiring width of more than 1 millimeter. Moreover, the shield pattern layer includes a shield pattern that is, from a plane view, overlapped on the wide-pattern area, and grounded without being electrically connected to an internal layer of other wiring pattern layers.

Growing community of inventors

Kawasaki, Japan

Yoshiaki Hiratsuka